feat: add getunderlyingrtcpeerconnection method on peerconnection cla…

…ss (#64)

src/peer-connection.ts

@@ -1,6 +1,6 @@
 import { EventEmitter } from './event-emitter';
-import { log } from './util/logger';
 import { createRTCPeerConnection } from './rtc-peer-connection-factory';
+import { log } from './util/logger';
 
 /**
  * A type-safe form of the DOMString used in the MediaStreamTrack.kind field.
@@ -45,6 +45,15 @@ class PeerConnection extends EventEmitter {
     };
   }
 
+  /**
+   * Get the underlying RTCPeerConnection.
+   *
+   * @returns The underlying RTCPeerConnection.
+   */
+  getUnderlyingRTCPeerConnection(): RTCPeerConnection {
+    return this.pc;
+  }
+
   /**
    * Adds a new media track to the set of tracks which will be transmitted to the other peer.
    *